TrapZ101: Lots of guy's include both versions of the regular squat, in a leg program. Others will do regular squats and the front squat, which also throws more of the work load onto the quads, in the same workout. Placing the heels on a 2" board, BB plates, etc, when doing front squats places better focus and balance when going into a deep squat position, also. Why Olympic lifters have raised heels built into their training shoes/boots. Pick which ever way you want, but probably a good idea to change up every 4 to 8 weeks weeks, or so, with a different approach to the squat.
There are three basic ways to handle squatting. BB high on neck/traps, back kept straight....strict style, pure BB'ing. BB resting on the shoulders/mid to upper traps area, which most average BB'ers use...back usually not in line with the bar/upper body. Greater chance of injury suggested...common bad form in the majority of lifters. BB resting (some times wedged) on the lower trap/back. This type placing resembles something close to a GoodMorning, with a upper body leaning forward quite a bit. Having a huge belly may actually help with this style squat. Foot placement will depend on he structure of the hips & joints. Going by the book, for any squatting, is not always suited for every person. Short to tall trainee's may all need a different foot placement. Experimentation may be required by each of us. Good Luck.
A advanced form of squatting is the box/bench squat, a exceptional exercise. This can be a learning exercise, where a technical approach is very important. Once learned, the regular squat can increase quickly. The box/bench squat also builds muscle mass quite well.